The Exo Terra Reptile UVB150 has a very high UVB output similar to sunlight in deserts. These places receive more direct sunlight. For this reason, desert reptiles are exposed to more UV radiation than other reptile species. The lamp can also be used on terrariums with denser mesh covers to ensure sufficient UVB radiation. Dense covers can filter up to 50% of UVB rays. The high vitamin D3 benefit index ensures vitamin D3 photosynthesis, which contributes to calcium absorption and protects against bone softening.